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Cadmium-oxygen-silver multicomponent electrical contact material and preparation method thereof

A technology of silver cadmium oxide and electric contacts, which is applied in contacts, circuits, electric switches, etc., can solve the problems of difficult processing, high temperature, weak breaking capacity, etc., to reduce environmental pollution and reduce the content of toxic cadmium , The effect of strong breaking ability

Active Publication Date: 2011-05-04
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as difficult follow-up processing, high temperature rise during use, and weak breaking capacity have not been well resolved, so that they still cannot replace Ag-CdO materials in many high-power applications.

Method used

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  • Cadmium-oxygen-silver multicomponent electrical contact material and preparation method thereof
  • Cadmium-oxygen-silver multicomponent electrical contact material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this embodiment, the silver cadmium oxide multi-component reinforced electrical contact material contains components and weight percentages: 5% CdO, 5% SnO 2 , 1% CuO, 0.5% NiO, 0.5% In 2 o 3 , the balance being Ag

[0044] Weigh 17.8Kg silver ingot, put it in a medium frequency induction furnace and melt it, then add 1Kg Cd, 0.8Kg Sn, 0.2kg Cu, 0.1kg Ni, 0.1kg In in sequence, melt and homogenize at 950°C, and mist under 10MPa nitrogen pressure Then put the atomized powder into a high-pressure container and heat it to 500°C, and oxidize it for 10 hours with an oxygen pressure of 3MPa. The oxidized powder was pressed into a green body under an isostatic pressure of 100 MPa, and then sintered in an oxygen atmosphere at 600 °C for 10 h. The sintered green body was hot-pressed at 900°C under a pressure of 300MPa, and then the hot-pressed green body was refired at 850°C in an oxygen atmosphere for 5 hours. The green body after reburning is hot-extruded, the hot-extrus...

Embodiment 2

[0046] In this embodiment, the silver cadmium oxide multi-component reinforced electrical contact material contains components and weight percentages: 6% CdO, 2% ZnO, 0.3% Bi 2 o 3 , 0.1% NiO, 0.5% In 2 o 3 , the balance being Ag

[0047]Weigh 18Kg silver ingot, place it in a medium frequency induction furnace and melt it, then add 1.2Kg Cd, 0.4Kg Zn, 0.3kg Cu, 0.02kg Ni, 0.06kg Bi, 0.1kg In in sequence, after smelting and homogenizing at 1300°C, at 0.3 Under MPa nitrogen pressure, atomize to make powder, then put the atomized powder into a high-pressure container and heat to 850°C, oxidize for 1 hour, and the oxygen pressure is 0.1MPa. The oxidized powder was pressed into a green body under an isostatic pressure of 500 MPa, and then sintered in an oxygen atmosphere at 900 ° C for 2 h. The sintered green body was hot-pressed at 400°C under a pressure of 700MPa, and then the hot-pressed green body was refired at 900°C in an oxygen atmosphere for 2 hours. The green body aft...

Embodiment 3

[0049] In this embodiment, the silver cadmium oxide multi-component reinforced electrical contact material contains components and weight percentages: 7% CdO, 6% SnO 2 , 0.1% CuO, 0.5% NiO, 0.5% Bi 2 o 3 , the balance being Ag

[0050] Weigh 17Kg of silver ingot, place it in a medium frequency induction furnace and melt it, then add 1.4KgCd, 1.2KgZn, 0.02kgCu, 0.1kgNi, 0.1kgBi in sequence, after smelting and homogenizing at 1150°C, atomize and make powder under 5MPa nitrogen pressure, Then put the atomized powder into a high-pressure container and heat it to 650°C, oxidize for 8 hours, and the oxygen pressure is 1MPa. The oxidized powder was pressed into a green body under an isostatic pressure of 250 MPa, and then sintered in an oxygen atmosphere at 750 ° C for 5 h. The sintered green body was hot-pressed at 750°C under a pressure of 500 MPa, and then the hot-pressed green body was refired at 750°C in an oxygen atmosphere for 5 hours. The green body after reburning is hot...

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Abstract

The invention discloses a cadmium-oxygen-silver multicomponent electrical contact material and a preparation method thereof. The material comprises the following components by weight percent: one of 5-12% of CdO, 1-5% of ZnO or 1-5% of SnO2 and the balance Ag. The invention adopts multicomponent reinforcement in the raw material and combines the advantages of all the reinforced phases so as to ensure that the material not only maintains the advantages of Ag-CdO such as good fusion welding resistance, strong breaking ability, low temperature rise and the like, but also has lower dosage of toxic cadmium, better electric arc burning loss resistance property and obvious silver-saving effect, and can replace cadmium-oxygen-silver to be used in the high power relay so as to reduce the environmental pollution caused by the production and application processes of the cadmium-oxygen-silver contact.

Description

technical field [0001] The invention relates to an electrical contact material and a preparation method thereof, in particular to a silver cadmium oxide multiple-reinforced electrical contact material and a preparation method thereof. Background technique [0002] With the development of electrical products in the direction of large capacity and small volume, the requirements for electrical contact materials are increasing --- the materials are required not to undergo welding, mechanical and electrical wear resistance under conditions of extreme arc heat and Joule heat It is good; less metal spatter is generated during the breaking process, and the arcing time is short; in a DC environment, it has good welding resistance, less material transfer, and low and stable contact resistance. [0003] Although the currently widely used silver cadmium oxide electrical contact material has excellent performance and low material cost, especially the high cadmium oxide content, the manuf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/0237H01H11/04C22C5/06C22C32/00C22C1/02C22C1/05C22C1/10C22F1/14
Inventor 甘可可祁更新陈晓陈乐生
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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